Checking answers these 2 right

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.